<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="allBox" /> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
         <contents v-for="(obj,index) in goodList" :key="index"
         :obj="obj"
         :ind="index"
         @adds="add"
         @dels="del"
         @dFn="dFn2"
         ></contents>

      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">
            {{allprice}}
          </td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import contents from "./components/购物车"
export default {
    components: {
        contents
    },
    props: ["checked"],
    data() {
    return {
        
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: true,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
      add(ind){
         this.goodList[ind].num++
      },
      del(ind){
          this.goodList[ind].num > 0 && this.goodList[ind].num--
      },
      dFn2(ind){
          this.goodList.splice(ind,1)
      }
  },
 computed: {
      allBox:{
          set(val){
            return this.goodList.forEach(obj =>obj.checked = val)
          },
          get(){
          return this.goodList.every(obj => obj.checked === true)
          }
      },
      allprice(){
        return this.goodList.reduce((sum,obj) =>　sum += obj.price * obj.num,0)
      }
  }
};
</script>

<style>
</style>